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    Question

    These questions are based on the following set of numbers: 642875446355748

    If in each number, all the digits are written in

    descending order, last digit of how many numbers thus formed will be a prime number?
    A 1 Correct Answer Incorrect Answer
    B 2 Correct Answer Incorrect Answer
    C 3 Correct Answer Incorrect Answer
    D 4 Correct Answer Incorrect Answer
    E 5 Correct Answer Incorrect Answer

    Solution

    642 875 446 355 748 642 875 644 553 874

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